<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        #box{
            width: 200px;
            height: 200px;
            border: 1px solid #f60;
            margin: 100px auto;
            display: none;
        }
    </style>
</head>
<body>
<input type="button" id="show" value="显示">
<input type="button" id="hide" value="隐藏">
<div id="box"></div>
</body> 
</html>
<script src="js/jquery-1.10.1.js"></script>
<script>
    $(function () {
        //点击显示
        $("#show").click(function () {
            $("#box").show();
        })
        //点击隐藏
        $("#hide").click(function () {
            $("#box").hide();
        })
    })
</script>